An Application of Finite Element Method in the Springback Analysis of U-Bend Process

• Main Authors: Chao,Mieng-Te, 趙明德
• Other Authors: Chen,Fuh-Kuo
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/04460831453078039831

碩士 === 國立臺灣大學 === 機械工程研究所 === 82 === Since high-strength steels were introduced into stamping, spring- back phenomena have become one kind of defect must be considered in sheet metal forming. The main objevtive of the research is to simulate the spring- back of three types of U- bend processes,including traditional U-bend process,double-bend process and bending-restriking process . By observing the profile of the blank or its changes in stress and strain,we can easily know the deformation mechanism. This is helpful for us to make a correct decision in die design. In the paper,we derive a simple theory firstly to demostrate the complexity of theoretical analysis,then we turn to use finite element method. We find traditional U-bend process can''t reduce the "apparent springback" effectively;"punch width varition" is the best of in five practical double-bend process;and bending- restriking process is more stable,the differences between products is small.